Setworks



June l5 1926. 1,588,642

M. E. WRIGHT ET AL SETWORKS Filed May 1 1925 @www physical embodiment of our Patented June 15, 1926.

UNITED STATES lnarran* or Flc-E.

SETWORKS.

Application led May 1, 1925. Serial N'o. 27,186.

Our present invention relates to improveA ments in set works applied to the carrlage of saw mills for use in sawing lumber for the purpose of securing accuracy in adjust-V ment with regard to the width of the lumber to be cut, and for maintaining the adjusted parts in rigid set position during the cutting operation.

In the set worksV now in use difficulty is encountered in retaining or locking the set works against recoil of movement of the ratchet Wheel of the set works. To prevent any rebound or recoil of the parts when operating upon lumber7 a locking pawl is now employed for the ratchet wheel, and a handle or lever is secured to the shaft of the pawl for controlling the pawl. A spring is employed to hold the pawl against the ratchet wheel of the set works to prevent retrograde movement of the ratchet wheel. rIhis means of stopping and locking the ratchet wheel has proven futile.

By the utilization of the device of our invention we provide means whereby the pawl and ratchet wheel co-act to positively stop and lock the wheel against recoil or rebound.

The invention consists -in certain novel combinations and arrangements of parts as will hereinafter be more fully set forth and claimed. 'v

In the accompanying drawings we have illustrated one complete example of the invention wherein the parts are combined and ar' ranged in accordance with the best mode We have so far devised for the practical application of the principles of our invention.

Figure 1 is a perspective view showing at the rear and top of the controlling column of the carriage sufficient of the set works to illustrate the application thereto of the device of our invention.

Figure 2 is an enlarged top plan view of a portion of the set works and illustrating the use of our stop and lock device.

Figure 3 is an enlarged perspective View` of the lock device of our invention detached. Figure 11 is a detail plan view partly in section showing a portion of the stop and lock device.

In order that the general assembly and relation of parts may readily be understoodv I have illustrated in Figure 1 the upper portion of the column or stand 1 which is carried by the saw carriage, and in which column the set shaft 2 is journaled in the column for controlling the set works. This controller shaft 2 is geared to a horizontal set shaft not shown, and the latter shaft as will readily be understood by those skilled in the art is connected in approved manner to impart the required motion to set and re cede the knees of the sawing machine. The ratchet wheel 8 of the set works is carried by the controller shaft 2, and a brass setting dial 1 in the form of a disk is geared to the controller shaft to indicate the distance of the lknees from the saw. The setting arm 5 swings freely around the ratchet vwheel and v carries a grip block 6 which is locked into the ratchet teeth 7 when sett-ing the machine for various sizes of lumber.

An automatic holding pawl 8 which engages the teeth'cf the ratchet wheel is used to prevent recoil of this wheel when the set is completed.

Therdevice of our invention co-operates with this pawl to stop and lock the ratchet .wheel 8 in set `posit-ion for preventing. re?

bound or recoil of the wheel.

The pawl is vcarried by a vertically'disposed shaft 9 journaled in the radially ars' ranged plate 10, anda pawl lever 11 on the shaft is connected by a cord or other flexible connection to the set lever indicated at 12 in Figure 1 invvhich the cord is also indicated as 13.

In equipping the pawl lever for use with the device of our invention we provide an actuating pin 14 which is rigid With and projects from the underside of the pawl lever and engages with the locking device for retaining the pawl lever and its pawl in set position.

The stop and lock device is located in position on the radial plate 10 so that the locking pin 14 may swing Within the device as the pawl lever is moved to lock the pawl to or unlock it from the ratchet wheel 3.

An attaching plate 15 which is fixed to the radial plate 10 supports the device Y through a pair of posts 16 and 16 and on these posts are pivoted two normally parallel levers 17 and 18 that are joined by a bolt 19 having a spring 20 and lock nuts 21, the latter on its free end. The bolt is v Vcarried by the lever 18 and extends through va slot in thelever 17, the spring 2O being interposed between the outer side of the lever 17 and the nuts 21 to insure a resilient pressure on the lever 17 to hold the levers in normalparaHel position asV in'Figure 4. Tl1esn=uts-2lmay be turned to vary the tension of the spring and thus vary the resilient connection betweentheA two ,levers which frictionally engage the look pin 14" between them, but at the same time per mit the pin to move between them when the pawl lever is turneda.

The swinging movement of the locking tothe lever;

Located'. '.withinl the space between the two levers-'is aloclfingl block or plate 24 which is .-f adjustable y longitudinally 'of f the lever 18` to ywhich lit is attaehed-byxbolts 2.5 passing through slots 26'infvthe lever. This-locking plate24E-fashioned with a notoh` 27 4and an-enid :cam oribeveled tace-28.` The relative arrangement10i2 r'the looking` pin and rloclingn plate are ,shown in'Fignres 3 and wherethe pawl levert is f inunlocked position, with its lockingfpm carried bythe lever disposed between thetwo lresiliently connected levers 17 Vand r18: When the pawl leveris swung to positionfto loc-k. the pawl againstv the teetheof the ratchet wheel,zthey locking; pin

rides over the cam face 28 to spread the therresiliently connected levers and 'asf the piiileavesithecam, .the former sli-ps into thenotch 27. In .this position the pawl has locked the ratchet ,wheel against movement and :the 1 pin, has lockedy thez pawllever against i swinging movement.n

To :unlock` they pawl by. disengaging the piny :from tits notch'7 the swinging; :movement of thel pawl leverwill be sui'icient ,to spread the resiliently` supported Lleversv against the tension Aof the spring y2O and permit the pin to. pass ontwardlytoward thefree ends of th'e levers. ri'he levers 17" andlS rock on their; pivot posts to compensate for the swinging movement of the pinv on its pawl lever; Thetensionof the spring 20 holds the pin in locked position between the two locking levers.

Having thus 'fully described onri inven-v tion, what we--claim -as new andfdesire` to securey by. Let-ters Patent isl. Thecombination with a pawl lever and its pin, ot'aspairrof lresilientlvconnected oscillatable leversj .means -coeacting with-'the pin for spreading` the levers and'means coasting witlithepin orretaininglthe latter in locked' position.v

2;. The combination Witlra-:pawl lever-and its pin; of :a pair ot resiliently-connected Zoscillatable leversE a lockingV plate onffone of said Ylevers3 a cam face on said plate.l and a looking notch on said` plate for co-actionk with the pin;

3. rEhe combination with a pawl-leverand its pim oi? a pair'oI" oscillatalole levers and a tension device for normally retainingsaid levers in parallel position, a locking-plate, means for retainingsaid plateat the inner side ot one of ssaidoscillatableflevers, a cam aceon said plate and a. locking` notch on said. plate for co-action with the pin.

In testimony; whereof ywe atiX oursignatures.`

MAURICE E. WRIGHT ALFRED VM; BRADEN. 

